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US 5,844,718 AGranted
Image processing apparatus and method in which multi-level color signal with removed edge component is encoded
AssigneeCanon Kabushiki Kaisha
InventorsHidefumi Ohsawa, Yasuji Hirabayashi, Tadashi Yoshida
Life of this patent
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Abstract
An image processing apparatus in which a multi-level color signal is input and converted into a binary color signal. An edge component is removed from the multi-level color signal based on the binary color signal and the binary color signal and the multi-level color signal of which the edge component is removed are encoded.
Claims33
An image processing apparatus comprising:
- input means for inputting a multi-level color signal having a plurality of color components;
- binarization means for extracting from the multi-level color signal a binary color signal representing a predetermined color defined by the plurality of color components, the binary color signal being obtained as a result of comparison of the multi-level color signal with a threshold;
- removal means for removing a color component defined by the binary color signal from the multi-level color signal, based on the binary color signal from said binarization means;
- and
- encoder means for encoding the binary color signal from said binarization means and the multi-level color signal of which the color component is removed by said removal means, respectively.
2 more elements
An image processing method, comprising the steps of:
- inputting an original image for designation of an area of an original image, by a predetermined reading means, and displaying the original image on a monitor;
- designating an area based on the image displayed on the monitor;
- inputting the original image, a second time, for encoding of the original image, by the predetermined reading means;
- encoding the designated area with a first encode method for a binary color image represented by a binary color signal relating to a predetermined color defined by a plurality of color components;
- and
- encoding an area other than the designated area with a second encode method different from the first encode method for multi-level color image.
3 more elements
An image processing apparatus comprising:
- input means for inputting image signals representing a color image having a plurality of color components;
- generator means for generating an area signal indicating an area which is to be processed as a multi-level color image area in the color image;
- first encode means for encoding signals within the multi-level color image area as multi-level color signals;
- and
- second encode means for encoding the image signals outside the multi-level color image area as binary color signals representing a predetermined color defined by the plurality of color components.
2 more elements
An image processing apparatus comprising:
- input means for inputting a multi-level color signal having a plurality of color components;
- binarization means for extracting from the multi-level color signal a binary color signal representing a predetermined color defined by the plurality of color components, the binary color signal being obtained as a result of comparison of the multi-level color signal with a threshold;
- removal means for removing a color component from the multi-level color signal, based on the binary color signal from said binarization means;
- and
- encoder means for encoding the binary color signal from said binarization means and the multi-level color signal of which the color component is removed by said removal means, respectively, wherein said encoder means includes a common encode circuit which is used for encoding the binary color signals and the multi-level color signals.
2 more elements
An image processing apparatus comprising:
- input means for inputting a multi-level color signal;
- binarization means for converting the multi-level color signal into a binary color signal;
- removal means for removing edge component from the multi-level color signal, based on the binary color signal from said binarization means;
- encoding means for encoding a given color signal and outputting an encoded color signal;
- and
- selector means for selecting either a first encode mode or a second encode mode, wherein in the first encode mode, said binarization means and said removal means are operated and said encoding means encodes the binary color signals from said binarization means and the multi-level color signals of which the edge components are removed with said removal means, while in the second encode mode, said binarization means and said removal means are not operated and said encoding means encodes the multi-level color signals without encoding the binary color signal.
3 more elements
An image processing apparatus, comprising:
- means for inputting an original image for designation of an area of the original image, by a predetermined reading means, and displaying the original image on a monitor;
- means for designating an area based on the image displayed on the monitor;
- means for inputting the original image, a second time, for encoding of the original image, by said predetermined reading means;
- means for encoding the designated area with a first encode method for a binary color image represented by a binary color signal relating to a predetermined color defined by a plurality of color components;
- and
- means for encoding an area other than the designated area with a second encode method different from the first encode method for multi-level color image.
3 more elements
Dependencies are inferred from the claim text.